UMLS的语义类型和语义网络

UMLS官方文档:
https://www.nlm.nih.gov/research/umls/new_users/online_learning/OVR_001.html

语义网络介绍页面:
https://www.nlm.nih.gov/research/umls/new_users/online_learning/SEM_001.html

UMLS定义的语义类型:
https://www.nlm.nih.gov/research/umls/META3_current_semantic_types.html

UMLS定义的语义关系:
https://www.nlm.nih.gov/research/umls/META3_current_relations.html

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